According to the D.A., Hefner will serve her sentence at the North Carolina Department of Adult Corrections.

Hefner was charged after injuries were discovered on her 3-month-old infant while police were investigating the death of the child's twin brother.

Burke County emergency services responded on January 31 to a call regarding a child that was not breathing.

The 3-month-old was hospitalized at Brenner Children's Hospital in Winston-Salem but died from injuries that investigators say were inflicted from abuse, allegedly from the child's father, 21-year-old Nicholas Brandon Clark.

Clark has pending charges for murder and felony child abuse.

The twin brother of the 3-month-old was also transported to the hospital for evaluation. Police say injuries were found consistent to a child being shaken.

Hefner admitted to shaking the surviving child two days earlier, leading to her arrest and guilty plea.